package d0312;

import java.util.Scanner;
public class daoxu {
    public static void main(String[] args){

        Scanner sc =new Scanner(System.in);

        System.out.print("输入圆的半径");
        int a =sc.nextInt();

        System.out.print("圆的周长是；"+a*2*3.14+"圆的面积是；"+a*a*3.14);

    }
}